Displacement: 7.45 cc (0.455 cu. in.)\
Bore / Stroke: 22.0 mm / 19.6 mm
Practical RPM Range: 2,000 – 17,000 RPM
Power Output: 1.65 hp (1.63 kW) @ 16,000 RPM
Engine Weight: 378 g (13.33 oz) (486 g complete with E-3071 Power box silencer)
Crankshaft Thread: 5/16″-24 UNF
The OS MAX .46 AX (and its successor, the 46 AX II) is widely considered one of the most reliable, durable, and user-friendly 7.45cc two-stroke nitro airplane engines ever manufactured. Built by O.S. Engines in Japan, it features an Advanced Bimetal Liner (ABL) cylinder lining, a dual-ball-bearing supported crankshaft, and a safely angled rear needle valve layout
